At 15:00 PDT all the user models on h1susey stopped running. They showed DAC errors. The IOP model continued to run, so SWWD did not trip. We suspect power cycling of the optical lever system which was occuring around this time could be the culprit. I restarted all the models, they all restarted with no problems.
Hugh, Dave:
We drafted a seismic IO Chassis power up sequence to protect the HEPI system from any non-zero DAC output voltage. The procedure document is DCC-T1600332. I labeled all Seismic IO Chassis and AI chassis in conformance to the document.
These had been energized yesterday so as to keep mag-lev batteries charged. NOTE: Pressure in Vertex Turbo 1.4 torr. Pressure in Diagonal, XBM and YBM Turbos ~0.4 torr -> Would like to investigate at some point.
~1515 hrs. local -> As measured at the check-valve @ HAM6, dew point <-35C. Kobelco compressor and drying tower units -> no alarms, temps and pressures as expected for conditions.
Phil, Marc
ECR E1600230-v1
WP 6053
We removed the ETM ESD Drivers from the X and Y end stations and upgraded them with the ability to handle PI Correction while in HV mode per ECR E1600230-v1. Both drivers were reinstalled into their respective enclosures, all cables were reconnected and the power was turned on.
Note CP7's LLCV setting is high (91%). This could be due to a combination of low Dewar level (23%) and high outside temperatures.
State of H1: OMC alignment work with IR beam started today, other parasitic work continues
Assistance: Stefan, Kiwamu, Sheila, JeffK
Alignment issue encountered and resolved:
Alignment of the IR beam to the OMC took a 200urad change in SR2 pitch, which Stefan and Kiwamu tracked down to a change on SR3 pitch driven by the cage servo, which read OSEM values.
The SR3 OSEMs had gotten some extra light and the servo moved the optic. Reseting SR3 restored the alignment to the OMC with only a reasonable (much less that 200urad) change on SR2.
OMC issue encountered and resolved:
Koji was unable to change the output of OMC-PZT2, which Sheila tracked down to a dependency on PZT1. Once the setting for PZT1 was changed, it was possible to manually control PZT2.
Activity: all times UTC
15:00-19:00:
everyone back for lunch ~19:00-20:00
20:00-23:00
Currently: - people at these locations
Currently: - issues with H1
Log for last half hour of the day:
22:35 Dave restarting EY SUS front end
22:40 I reset ETMy, TMSy, and EY ISI watchdogs
22:43 TJ to HAM 6 to deliver CDS laptop
22:47 Jason and Nutsinee out of LVEA
~1050 hrs. local -> Started pumps at West end of BSC6 ~1110 hrs. local -> Began heating RGA. RGA is isolated from BSC6 via a closed 2 1/2" metal-sealed valve. The RGA is being pumped via a small (bolted to RGA) turbo (4.5" CFF) backed by a 2nd turbo which is backed by a scroll pump. Vent protection is provided via an electropneumatic isolation valve in-line between the two turbos. This valve closes upon a pressure signal or a loss of power. A second isolation valve (spring/electric solenoid) is mounted at the scroll inlet. This valve closes only at the loss of power. Neither turbo utilizes a vent valve. Backing pumps are clamped to each other and to BSC6 stand weldment.
The list of high frequency calibartion lines injected before and during ER9. These are not necessarily the times when IFO was locked but only the time when the particular excitations were on. Frequency Amplitude Start Time Stop Time (Hz) (ct) (UTC) (UTC) -------------------------------------------------------------------- 1000.3 35k 06-27 23:03 06-28 23:51 1501.3 35k 06-29 00:16 07-01 04:48 2001.3 35k 07-01 04:50 07-01 15:08 2501.3 40k 07-01 15:20 07-05 19:04 3001.3 39k 07-05 19:00 07-09 17:41 3501.3 39k 07-09 18:32 end Analysis to follow.
J. Kissel I was able to grab some charge measurements yesterday afternoon. Will process in good time. Only 4 and 3 of the data points for ETMX and ETMY were free of problems, so though there are 5 and 4 folders, I suspect only the first for will process correctly. Folders are quoted below lest we forget: /ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ETMX/SAGL3/Data/ data_2016-08-03-19-47-12 data_2016-08-03-19-59-06 data_2016-08-03-20-10-54 data_2016-08-03-20-22-36 data_2016-08-03-20-34-21 /ligo/svncommon/SusSVN/sus/trunk/QUAD/H1/ETMY/SAGL3/Data/ data_2016-08-03-19-55-57 data_2016-08-03-20-07-41 data_2016-08-03-20-19-26 data_2016-08-03-20-31-11
Charge measurements have been processed and/or retaken. See LHO aLOG 28881.
State of H1: new OMC is in HAM6 - needs further work, shutter is closed - no IMC, site activities taking advantage of the down time
Activities: all times UTC
15:00 - JeffB - new dust monitor, #7, sampling same volume as #6 - test of system and low dust counts
15:45 - Richard - WP6053 - EX and EY Low voltage ESD driver modifications
Added a new dust monitor at HAM6 for huddle testing. The new monitor (#7) is strapped to the back of the support stand for the existing monitor (#6). To the crew working around the NE corner of HAM6, please be aware of the new monitor. I have not adjusted the alarm levels. This monitor will be removed shortly after the HAM6 vent is finished.
[Betsy, Corey, Chris, Koji]
Summary
- A panel of the OMC black glass shroud with a burned spot was removed. LHO aLOG 28861
- The new OMC is now suspended in the OMC SUS
- We still need balancing work of the suspension
- Once the OMC breadboard is nicely balanced, the beam will be aligned.
- We'll performe the electrical function check.
Details
- The new OMC container was moved from the bonding lab to LVEA
- The weight of the old and new OMC was compared. All the balance masses were moved from the old OMC to the new OMC. Then to reduce the exess mass of the new OMC, 10g mass was removed from each ballast at the DCPD side. (10g+10g was removed.) This made the new OMC 2g lighter then the old one. Betsy keeps the actual numbers.
- The first contact films were removed at the chamber side. Some residuals were seen on non-cavity mirror optics. They were removed by another trial of the FC.
- Then the new OMC was installed on the OMC Suspension.
- The cabling of the OMC was restored.
- The locks of the suspension masses and the blades were released. Now the OMC Breadboad is freely suspended.
- The balance of the OMC breadboard was reviewed. One of the corner is about 1mm too high. As we already adjusted the total weight, this should be done by moving the ballast mass on the breadboard.
Photos From Yesterday's HAM6 Work
All photos from yesterday's work are in resourcespace in a folder for 8/3's work here:
https://ligoimages.mit.edu/?c=1698
Attached are some highlight photos:
J. Kissel ECR E1500045 FRS 6014 WP 6051 I've begun the roll out of individual state switch-ability for the PUM / L2 coil drivers. This is essentially complete for the ETMs (just a few more aesthetic MEDM screen changes are needed). I've confirmed all functionality behaves as expected. I've reconciled the SDF "down" snap before hand, and made sure that all settings were restored, including initializing/accepting the new EPICs records that come with this update. Though the model changes have been made to the simulink model for the ITMs (because the ITMs and ETMs are using a generic L2 stage library part), they have not yet been compiled or installed, and MEDM screens have not been updated (because they now have separate MEDM infrastructure [see LHO aLOG 27641], generic changes to all QUADs like this takes twice as long). Stay tuned for more details and screenshot in tomorrow's "it's complete" aLOG. Still to Do: - Edit EUL2OSEM MEDM screens to support the ramping matrix on ETMs - Compile / Install / Restart ITM models (with accompanying DAQ restart) - Edit ITM QUAD OVERVIEW and BIO screens for all the same changes as I've done to the ETM QUAD overview - commit everything to the SVN - Make sure that the ISC_LOCK guardian hits the "LOAD MATRIX" button on the PUMs in the DOWN state. - Integrate new "three wheel motion" coil driver switching into the ISC_LOCK guardian in the COIL_DRIVERS state
We had a strange issue with the h1susetmx restart. The H1SUSETMX.ini file was changed at 17:08, h1susetmx was restarted at 17:10 and the DAQ was restarted at 17:12. Yet the DAQ status for h1susetmx ended up as 0x2000 (ini file check sum mismatch). A restart of h1susetmx fixed the problem. With so much time between restarts this does not look like a slow NFS file issue.
The HV power cable for the Y2-8 ion pump has been repaired. The damaged section was cut off, and the cable was spliced together. Cable was tested with the HI-POT tester to 5KV.
Connected cable to controller and turned ion pump on. Pump is pumping now, see attached for 3 hour trend data.
Thank you!!
Work done under WP #6047 and FRS ticket 5992 closed
RPN: 35W- no change
200W- no change
FRQ: 35W- no change from 10Hz to 1K. Control signal is better than last week from 1-10Hz. Error signal higher at HF.
200W- no change
PNT: 35W- no change
200W- no changes to speak of. High peaks at 100Hz, 1K and HF noise.
MSC: 35W- no change. TEM10 looks a bit high. HOM power and cts are down marginally from last week
200W- no significant change. Plot actually looks slightly better than last week despite no adjustments. Errors during measurement can be seen in the .pdf below.
Ed's analysis is spot on. No serious changes from previous scans.
(Betsy, Corey, Keita, Koji & also some photos by Richard M)
Following up on alogs from Keita & Koji, photos from yesterday's work has been uploaded to resourcespace and can be found here:
https://ligoimages.mit.edu/?c=1696
(There's 91 photos. I did not upload blurry photos.)
I'm attaching highlight photos to this alog & they are roughly numbered in the order taken:
> 4. Burn hole at entrance aperature on the shroud glass for OMC
Today, we took out the black glass panel with a burn hole from the OMC shroud.
The attached close-up photo shows the burn hole above the entrance aperture to the OMC. Also, you can observe many more craters.
As we are going to install the replacement panel, we wonder what was the cause of these misaligned craters and what was the difference between the small craters and the biggest burn hole.
~10:00AM WED AUG 4th, 2016 - Chamber entrance Particle counts with hand held CC counter:
| Particle size | Outside of chamber cover, in CR | In chamber above table |
| 0.3um | 70 | 0 |
| 0.5um | 20 | 0 |
| 1.0um | 10 | 0 |
~1PM WED AUG 4th, 2016 - Chamber entrance Particle counts with hand held CC counter:
| Particle size | Outside of chamber cover, in CR | In chamber above table |
| 0.3um | 0 | |
| 0.5um | 0 | |
| 1.0um | 10 |
